Manufacture of paper



Feb. 8, 1949. CRABTREE 2,461,109

MANUFACTURE OF PAPER Filed Sept. 30, 1944 2 Sheets-Sheet l \NVENTOR K. CRABTREE ATTORNEYS Feb. 8, 1949.

K. CRABTREE 2,461,109

MANUFACTURE OF PAPER Filed Sept. 30. 1944 2 Sheets-Sheet 2 F IG. 3

ENVENTOR ATTORNEYS Patented Feb. 8, 1949 I 2,461.109 MANUFACTURE OF PAPER Kay Crabtree, Crabtree Mills, Quebec, Canada Application September 30,1944, Serial No. 55e,5oe

1 Claim. (01. 92-68) 1 This invention relates to the manufacture of paper and particularly to the seasoning thereof which give rise to various difficulties in paper converting plants.

The particular object of this invention is to provide simple and effective means whereby paper coming from the dryers or calenders at the dry end of a paper making machine is properly seasoned as it is wound into a roll. This is accomplished by passing the paper over a hollow seasoning" drum to a winding shaft which is supported and rotated by the drum to wind the paper into a roll. A cooling liquid. which has been cooled to a predetermined low temperature by refrigeration, is circulated through the drum so as to chill the surface of the drum which is rotated in contact with the paper. In this arrangement the paper is properly seasoned by the cooling effect of the drum and also by reason of the fact that the paper picks up and absorbs a certain amount of moisture which collects as condensate on the chilled drumsurface over which the paper is passed.

According to a preferred embodiment of this invention the cooling liquid supplied to the drum is preferably sprayed against the inner surface of the peripheral portion of the drum over which the paper is passed to the winding shaft. This cooling liquid may consist of water, brine or other liquid refrigerant which has been cooled to a predetermined temperature, for example 41 F.,'

before being delivered to the drum. This may be accomplished by connecting the drum so that it constitutes the expander of a refrigerating circuit of the compressor-condenser expander type.

Other objects, advantages and characteristic features of the invention will be more readily understood from the following detailed description taken in connection with the accompanying drawings, in which- Fig. 1 is an end elevation of a paper seasoning" and windin'gapparatus embodying my invention.

Fig. 2 is an end elevation of the paper seasoning-winding drum shown in Fig, 1. i v

Fig. 3 is a longitudinal sectional view of the winding drum shown in the preceding figures.

Referring more particularly to the drawings,

5 represents a web of paper coming from the I dryers orcalenders at the dry end of a paper making machine. This web is passed beneath a spread roll 8 and then upwardly around a substantial area of the peripheral portion of a winding drum I to a winding shaft 8 which is supported on I to eliminate curling and wavy" characteristics 2 and rotated by said drum. The leading end of the web is attached to the winding shaft so that, during rotation of said shaft, the paper is wound thereon to provide a roll of the desired size. The

ends of the winding shaft 8 are rotatably mounted in bearing supports 9a provided by'the upper ends of a pair of swinging arms 9 (only one of which is shown) having their lower ends secured to a cross shaft l0 located at one side of and parallel with the winding drum 1. The drum fl; winding shaft 8 and swinging arms 9 conjointly provide a drum reel for winding the paper into a roll and are mounted on a suitable frame structure If in accordance with the conventional practice followed in the construction and mounting of the component parts of an ordinary drum reel.

The drum I is provided with end trunnions Ho and I3 which are journalled in suitable bearings ll. The trunnion |2a is shown broken off but it will be understood that in practice, this trumiion will be equipped with a pulley or other means (not shown) to enable the drum to be driven from a suitable source of power. a hollow trunnion which is enclosed by the housing of hearing if and serves as a liquid discharge outlet for the drum. The outer end of trunnion l3 communicates with a liquid discharge chamber it to which a liquid discharge line I1 is connected. The liquid discharge chamber I6 is formed by a casing l'la which is attached to the housing of bearing l4 and has formed integral therewith a casing i0 affording a liquid inlet chamber l9 from whence a pipe 20 extends through the trunnion l3 and into the drum I. Pipe 20 is provided with a multiplicity of openings 2| through which liquid supplied to said pipe is sprayed against the inner surface of the peripheral wall of the drum as indicated in Fig. 3. Water, brine, or otherv discharge chamber l8 and'water discharge pipe The water supply pipe 22 is preferably connected, through suitable condenser units, to. the discharge side of the compressor of a liquid refrigerating system by means of which the liquid supplied to the drum is cooled to a predetermined low temperature such, for example, as 41 F.

' The liquid refrigerant discharged from the drum The trunnion I3 is' 3 through discharge pipe I! is delivered to a liquid storage tank connected to the suction side of said compressor.

In connection with this type of installation it will, of course, be understood that the refrigerating system will be provided with suitable controls whereby the temperature of the liquid refrigerant supplied to the drum 1 may be varied to suit different operating conditions. As previously stated, the liquid refrigerant supplied to drum 1 may consist of water, brine or any other liquid refrigerant. The chilling of the drum by the liquid refrigerant circulated therethrough results in a definite cooling of the paper as it passes over the drum to the winding shaft. This chilling of the drum also results in the collection of condensate on the surface of the drum over which the paper passes and this condensate is picked up and absorbed by the paper with beneficial seasoning effect. Since the drum and the winding shaft rotate in the direction indicated by the arrows X and X it will be seen that paper is wound on the winding shaft so that the surface of each convolution which has been in contact with the moist chilled surface of the drum is pressed against the surface of the next convolution which has not been in direct contact with the drum. This ensures that the paper will be more uniformly seasoned on both sides and throughout its thickness than would be the case if the paper were wound into a roll with the drum-cooled and moist surface of one convolution in contact with the drum-cooled and moist surface of the adjacent convolution.

Having thus described what I now conceive to be the preferred embodiment of this invention it will be understood that various modifications may be resorted to within the scope and spirit of a close coil and moistening the other side through transfer of moisture thereto by contact with the previously moistened side as the coil is formed. the moistening of the-one side of theweb and the chilling of the web by said surface being prolonged by contact of the web therewith until removed from said surface and coiled and the moistening of the opposite side of the web being continuous with the coiling of the web and continuous with the chilling and moistening by said contact surface.

KAY CRABTREE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 168,978 Firm Oct. 19, 1875 1,604,026 Dechau Oct. 19, 1926 1,900,166 Dix Mar, 7, 1933 1,914,798 Bidwell June 20, 1933 1,962,882 Shotwell June 12, 1934 2,001,023 Howell et al May 14, 1935 2,224,803 Standley Dec. 10, 1940 2,264,542 Montgomery Dec. 2, 1941 2,366,563 Shaw Jan. 2, 1945 

